Assembly lock for cabinet heaters



March 20, 1934. Y 1,951,541

ASSEMBLY LOOK FOR CABINET HEATERS Filed April 17, 1953 nuuuumuunnmggmmunum ,0

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Patented Mar. 20, 1934 UNITED STATES PATENT OFFICE 4 Claims.

My invention relates to cabinet heaters having a heat radiating core in the cabinet and usually positioned, near the bottom thereof, but made into a separate assembly after which it is inserted intothe cabinet, usually from the bottom.

The core of this type of device is made to fill all of the space transversely of the cabinet. In common practice brackets are provided to which the core is made fast by means of screws or bolts; this plan of attaching the core for obvious reasons is expensive, difficult and ineflicient and the bolts or screws frequently work loose and are lost during handling and shipment.

When heaters of this type are installed in the room to be heated it is the custom to remove the core from the cabinet and make suitable pipe connections whereby the core is properly positioned in the room, after which the cabinet is placed into position over the core and made fast thereto by means of the bolts or screws- At this time, however, these operations are for obvious reasons more difficult than at the factory. The holes may not be in proper alignment and even if they are it is difficult to insert and tighten the bolts.

I provide a low cost boltless fastening which is automatic and definite in action. With my improved fastening when the core is inserted in the cabinet it is automatically attached to the cabinet. To remove the core it is necessary only to use the end of a screw driver or the like and disengage the holding latches. When the core has been installed or connected to the pipes, it is then necessary only to press the cabinet into position over the core, the latches acting to slip over the projections on the core and then they will hold the assembly as securely as if fastened togther by means of bolts or screws.

My invention has, therefore, for its object a simple and automatic fastening which requires no effort to attach and little eifort to detach, and provides a fastening which cannot jar loose or become accidentally detached from the core.

I accomplish these objects by providing novel holding latches formed preferably from a single piece of fiat stock, suitably positioned and preferably spot Welded to the walls of the cabinet.

To these and other useful ends this invention consists in matter hereinafter set forth and claimed and shown in the accompanying drawing in which:

Figure 1 is a front elevation of a conventional cabinet heater equipped with my invention, having portions of the front wall cut away to clearly illustrate the position of the radiator core in the cabinet.

Figure 2 is an end elevation of the: cabinet: shown in Figure 1, having a portion of the: end wall of the cabinet cut away;

Figure 3 is a fractional view of the cabinet heater taken on line 3 of Figure. 2'.

Figure 4 is an enlarged front view of my preferred form of holding device.

Figure 5 is a side elevation. of the device shown in Figure 4.

Figure 6' is: av front elevation of a modification.

Figure 7 is a side elevation of the. device shown in Figure 6..

Figure 8' is a front elevation of another modification.

Figure 9 is a side elevation of the device shown in Figure 8.

As thus illustrated, 10 designates the cabinet which is preferably made from sheet steel and preferably rectangular in shape ona'horizontal section and of a suitable height to act as a chimney to thereby induce a natural air draft into the open bottom as at 11 and out. by way of the grille 12 which may be in the upper frontiof the cabinet or in the lid or topthereof.

The usual radiating core or heat con-vector is provided, which in its entirety is designated by reference character A. This convector comprises two suitable end headers intowhich the inlet and outlet pipes- 14 are suitably'attached. Elliptical tubes 15 form a connection between the headers for the passage of heating. liquid or gas, suitable fins 16 are assembled and closely spaced on the tubes 15 to thus increase the radiating surface of the core. The core which is preferably thus formed is adapted to fit closely into the bottom of the cabinet, as illustrated in Figures 1 and 2, whereby all of the air that passes into the cabnet at 11 will be heated by convection and caused thereby to more rapidly pass through the cabinet.

I provide projections 17 on the headers 13 and preferably adjacent their ends to thus form four corner supports for the core A.

I also provide preferably a one-piece holding bracket 18 which is attached by spot welding pref erably to the end walls of the cabinet and suitably positioned between the projections 17 and the end walls.

The bracket 18, as previously indicated, is preferably made from flat stock and latches or tongues 19 are cut from the stock and bent whereby they converge inwardly to thus form stops between the end of which the projections 1.7.are adapted to fit, as indicated in Figures 1 rec and 3. Thus when the core A is pressed into the cabinet, the end walls of the cabinet 1 will yield to the pressure of projections 17 against latches 19 and then force the latches inward when the projections 17 reach the opening between the ends of the latches 19. Thus the core will be held firmly into the position indicated in Figures 1 and 2. To remove the core from the cabinet the brackets 18 are forced outward by means of a screw driver or the like.

Referring now to the modification illustrated in Figures 6 and '7, 25 designates the base of the fastener, the stop 26 is cut from the base and formed in the shape shown, the tongue 27 also is out from the base and formed as shown to thus act very similar to member 19 in Figure dexcept that the tongue 27 is ld'ng and, therefore, will act as a spring to thereby yield tothe pressure of projections 17 and permit insertion of the core into the cabinet independent of the action of the end walls.

The fastening shown in Figures 8 and 9 differs from that shown in the other figures in that the latches are formed from flat stock in separate pieces, each piece being adapted to be suitably positioned and spot welded to the end wall of the cabinet. In these figures, l0 designates a frac tion of the wall of the cabinet. The latches 30 which converge inwardly are positioned similar to the latches illustrated in Figures t and 5.

Thus it will be observed that I have provided a very simple and efiicient holding device for the heating core, a device which is simple, easily and ,1 cheaply manufactured and attached to the walls 35- of the cabinet and which economically lends itself to the various assembling and disassembling operations. ,Also a device which cannot shake loose or become disengaged.

Attention is called to a desirable feature of the bracket 18 and shape of its latches, converging as they do when subjected to pressure in either direction, horizontally, the ends or the latches will tend to move toward the core and thus prevent the projections 17 from slipping out of engagement.

Obviously, my holding device may be used on other devices of this general construction wherein an assembly is inserted into an enclosure of this general type. Obviously, when considering the holding device, the order of things may be re-. versed wherein the projections are positioned on the cabinet walls and the latches attached to or form an integral part of the core, and various other detail changes made without departing from the scope of my invention.

Having thus shown and described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A locking means for securing a closure to a heating core, comprising unitary holding brackets attached to the inside walls of the closure and adapted to engage projections on the heating core, said brackets formed from flat stock each having a pair of inwardly converging latches, forming openings therebetween, said walls adapted to yieldingly permit said projections to reach said openings, when said closure is moved into position over said core, and cause said latches to engage said projections whereby to hold said closure in position on said core.

2. A locking means for securing a closure to a heating core, comprising unitary holding brackets attached to the inside walls of the closure, and adapted toengage projections on the heating core, openings formed on said brackets having tapering approaches which cooperate with the walls of said closure to yieldingly permit said projections to reach said openings when the closure is moved into position over said core, and cause said openings to engage said projections, whereby to hold said closure in position on said core. r

3. A locking means for securing a closure to a heating core, comprising unitary holding brackets attached to the inside'walls of the closure, and adapted to engage projections on the heating core, said brackets each having a limit stop and an inwardly projecting latch which cooperates with the walls of said closure to yieldingly permit said projections to reach said stops when said closure is moved into position over said core, and cause said latch to engage said projections, whereby to hold said closure in position on said core;

4. A locking means for securing a closureto a heating core, comprising holding brackets attached to the inside Walls of the closure and -adapted to engage projections on the heating core,

said brackets formed from flat stock and comprisproach which cooperates with said closure walls to yieldingly permit said projection to reach said stop, when said closure is moved into position over said core, and cause said latches to engage said projections whereby to hold said closure in positionon said core. I I FRED'M. YOUNG.

120 ing a stop and a latch having a tapering ap- 

